The life cycle of thunderstorm gust fronts as viewed with Doppler radar and rawinsonde data

摘要: Abstract This paper presents the time-dependent analysis of thunderstorm gust front with use Project NIMROD data. RHI cross sections reflectivity and Doppler velocity are constructed to determine entire vertical structure. The life cycle is divided into four stages: 1) formative stage; 2) early mature 3) late 4) dissipation stage. A new finding a horizontal roll detected in pattern resulting from airflow that deflected upward by ground, while carrying some smaller precipitation ahead main echo core squall line. feature called “precipitation roll”. As determined rawinsonde data, cold air behind accounts for observed surface pressure rise. Calculations confirm collision two fluids produce nonhydrostatic at leading edge outflow. equation governing propagation speed density current accurately predicts t...